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Face-to-face Printing Within Booklet - Patent 8126388

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Face-to-face Printing Within Booklet - Patent 8126388 Powered By Docstoc
					
				
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Description: This invention relates generally to producing improved printing of face-to-face pages within a booklet and, more specifically, to a method for printing pages within a booklet to improve face-to-face appearance and the booklet produced thereby. Customer acceptance of booklets assembled from duplex pages is sensitive to the consistency of appearance of opposing pages. Differences in color gamut, gloss, image size, and clarity are some of the problems encountered. Problems relating tocluster printing, that is, jobs assembled from separate machines include sheets with different gloss, color gamut, and image quality characteristics. Tandem immediate duplex (xerographic) printers provide normal ordering of front sides on a first photoreceptor and back sides on a second photoreceptor, which also leads to similar problems. One example of such an apparatus is a tandemimmediate duplex (color) xerographic (continuous) web printer. Another example is a tandem immediate duplex xerographic (cut sheet) printer, wherein images destined for the front sides of the physical sheets, i.e., the odd numbered pages, are imaged anddeveloped sequentially on a first photoreceptor and images destined for the back sides of the physical sheets, i.e., the even numbered pages, are imaged and developed sequentially on a second photoreceptor. The physical sheets are fused twice; the firsttime in fuser #1 after transfer of the image on the front side of the sheet and the second time in fuser #2 after transfer of the image onto the back side of the sheet. Images on opposing pages have a different fused state and have been imaged/developedon different photoreceptor units. For example, an odd numbered page having an image developed on photoreceptor #1 that has been fused twice is opposed by an even numbered page having an image developed on photoreceptor #2 that has been fused only once. Recirculating duplex printers having fusers present only the more subtle problem of differing fused state of